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Showing 1 to 20 of 24 for “"deuterium oxide"”.
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The centrifugal distortion coefficients of the molecule hydrogen deuterium oxide
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Physics, 1951.
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Multiphoton Contributions to Far Infrared Generation in Optically Pumped Deuterium-Oxide
Made available in DSpace on 2015-05-13T15:22:17Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 8004253.PDF: 4877249 bytes, checksum: 9e1751f6cc98f26d5fb40c5d468a0b93 (MD5) Previous issue date: 1979
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O((1)S) metastable production from electron impact dissociative excitation of water, deuterium oxide and nitric oxide.
Using a solid Xe matrix upon a cold finger, at temperatures less than 77 K, O(1S) metastables produced from electron impact dissociative excitation of H2O, D2O, and NO were observed. From time-of-flight observations, total released kinetic energy spectra for the dissociative channels were …
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Body composition of dogs determined by carcass composition analysis, deuterium oxide dilution, subjective and objective morphometry, and bioelectrical impedance
… male random source dogs using in vivo methods of deuterium oxide dilution, subjective and objective morphometry, bioelectrical impedance and ultrasound, either separately or in various combinations. Carcass composition determined by chemical analyses of carcass homogenates served as criterion …
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The characterization of starches and maltodextrins by proton nuclear magnetic resonance spectroscopy
… methods were developed using 0.6 N potassium hydroxide-d/deuterium oxide (KOD) (Method I) and dimethyl sulfoxide-d$\sb6$ (DMSO-d$\sb6$) (Method II) as the solvents. A 90 degree pulse width for the (1,4) and (1,6) protons and minimal recycle time were used to eliminate interference from the …
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Development and Application of 19F NMR of Proteins
… dissolved oxygen, solvent isotope shifts from deuterium oxide, and 1H-19F NOEs were each sufficient in establishing relative solvent exposure, while the combination of effects from oxygen and deuterium oxide were able to delineate local hydrophobicity and solvent accessibility of 19F probes. …
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Multi-omic Approaches to Investigate the Inflammatory Response in Activated Macrophage Cells
… labelling methodology was developed using<br/>deuterium oxide (2H2O) in conjunction with high resolution mass spectrometry for the simultaneous measurement of the rates of synthesis of individual lipids and proteins on a cellular-wide scale. The results revealed altered dynamics …
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Dietary Control of Cystinuria in Maned Wolves (Chrysocyon Brachyurus)
… three maned wolves, using orally administered deuterium oxide. Urine samples were collected daily for seven days, purified by sublimation, and analyzed by infrared spectrometry. It was determined that total body water, water turnover rate and body composition were 17.2 L, 2.3 L/d, and 20.5% …
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Measuring compositional and growth properties of single cells
… in a water-based fluid and subsequently in a deuterium oxide-based fluid, which rapidly exchanges the intracellular water content. Correlations between dry density and cellular proliferation and composition are described. Dry density is described as a quantitative index that correlates with …
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Studies of the surface and bulk reactivity of calcium hydroxide
… of commercially available samples of calcium oxide and hydroxide were investigated. 'Fresh' and 'aged' (Le. exposed to the atmosphere) samples were characterised by Fourier Transform Infra-Red Spectroscopy, Thermo-Gravimetric Analysis, Nitrogen Adsorption, Water Adsorption, Scanning Electron …
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The reduction of organic halides and diazonium salts with sodium borohydride
Sodium borohydride in aqueous dimethylsulfoxide has been shown to be a good reducing agent for converting certain activated aromatic halo-compounds to their corresponding dehalogenated products. The order for ease of removal of the halogen is I>Br>Cl. The activating groups are those that are …
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Reactions of 4-chloro-2,6-dimethoxypyrimidine and 2-chlorothiazole with carbanion nucleophiles
… the product resulting from displacement of methoxide was the major substitution product, while reaction of 1 with propionitrile carbanion afforded a preponderance of the product resulting from chloride displacement. Photostimulated reaction of 2-chlorothiazole (2) with the potassium enolate of …
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Dietary cholesterol in graded amounts : threshold to ceiling effects upon plasma free cholesterol synthesis, equilibration and circulation levels in humans
… subjects were given a priming dose of 0.7 g deuterium oxide(D20)/kg body water followed by maintenance doses over 24 hours. Cholesterol synthesis was determined as the fractional synthetic rate (FSR)of the rapid exchangeable pool calculated by deuterium incorporation from body water into …
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Rapid identification, confirmation, and quantitation using an open-air ion source coupled to a time-of-flight mass spectrometer
… in an analyte molecule achieved by hydrogen/deuterium (H/D) exchange by treatment with deuterium oxide (D<sub>2</sub>0) in the DART sample gap. Mass spectra acquired in the presence of D<sub>2</sub>0 of analytes containing active hydrogen atoms associated with hydroxyl, amino and carboxylic …
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Determination of the Site of Ultrasonic Absorption in Suspensions of Large Unilamellar Vesicles
… the LUV was investigated by replacing water with deuterium oxide. The polar headgroup region of the LUV was perturbed by the addition of divalent cations to the suspension. In both studies, although the t$\sb{\rm m}$ of the phase transition, as detected by ultrasound, was changed, …
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A study of the vapour phase pyrolysis and alkaline hydrolysis of chloroform
… gas-liquid chromatography, whilst the sodium hydroxide concentration was determined by titration with dilute hydrochloric acid. The reaction was second order overall, first order with respect to each of the reactants. Data obtained at 25˚C, 31˚C, 36˚C and 41˚C was used to determine the activation …
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Effects of weaning age on body composition and growth of ex situ California sea lion (Zalophus californianus) pups
… estimated using blubber depth measurements and deuterium oxide dilution to determine if weaning age had an effect on subsequent pup development and growth. Blood urea nitrogen and blood glucose levels were observed for their response to changes in body condition, while thyroid hormone levels in …
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Dynamic proteome profiling of human muscle responses to high-intensity interval training
… also contribute to muscle function. We have used deuterium oxide to label newly synthesised proteins in vivo and then analysed muscle biopsy samples using peptide mass spectrometry techniques that are capable of identifying individual proteins and measuring their relative abundance and fractional …
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Electrochemical oxidation of aliphatic carboxylates: Kinetics, thermodynamics, and evidence for a shift from a concerted to a stepwise mechanism in the presence of water
… the reaction mechanism. Deionized water and deuterium oxide additions to anhydrous acetonitrile were performed to test this hypothesis. The mechanism was noted to shift towards a stepwise mechanism as water was added. In addition, the derived oxidation potentials became more positive with …
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Performance nutrition to support athletes and aging
Skeletal muscle plays a critical role in several metabolic processes that support both physical performance and metabolic health. Performance nutrition is an emerging field that aims to identify optimal nutrition and exercise strategies for physical performance, which includes the maintenance …
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